Calcium Sulfate
Calcium sulfate is an FDA-approved additive used as a stabilizer and to add firmness to processed foods. You can find the chemical in all kinds of foods, ranging from dairy products such as cheese or condensed milk to grain-based products like bread or pasta.
Even some protein sources, such as tofu, sometimes are produced with calcium sulfate. Luckily, the substance is generally regarded as safe for use in small amounts.